With the proposed ocular exams at baseline and at 9-months post treatment, the investigators hope to detect any cataracts in the subjects and effects of the proposed radiation treatments. The questions the investigators will have are how often they encounter them in early Alzheimer's and whether they improve (an abscopal effect) after radiation therapy, even though the lenses will be excluded from the RT treatment fields. Exams will only be done for subjects who have at least one natural lense still present. Subjects with previous cataract corrections will not have ocular exams performed.